In DayZ, the infected wandering Chernarus are rarely what kills you. Far more survivors die slowly, sat in a corner of a barn, shivering and vomiting from an illness they could have prevented. Drinking from the wrong pond, eating an undercooked bear steak, or bandaging a wound with a dirty rag can each spiral into a disease that drains your stats faster than you can replace them. This guide breaks down every major vanilla sickness, what causes it, how to recognise the symptoms, and exactly which medicine cures it.
Everything below is based on the base game. Some hardcore community mods such as Namalsk add their own afflictions like frostbite and the “blindness” mechanic that are not covered here — if you play a modded server, check that server’s rules, because numbers and disease behaviour can change.
The immune system: your hidden defence
Before the individual diseases, understand the stat that ties them all together. Your Immune System strength is calculated as the average of your Energy, Water, Blood and Health stats. When all four are high, your body resists infection and can even shrug off some illnesses without medicine. When you are starving, dehydrated or low on blood, your immunity collapses and diseases take hold almost instantly.
Multivitamin Pills temporarily boost immunity to maximum for roughly five minutes. Because of this, a vitamin taken before you eat questionable meat or drink dirty water can stop you ever catching salmonella or poisoning in the first place — the single most useful prevention trick in the game.
Cholera: the dirty-water disease
Cholera is a bacterial infection spread through unsafe water. You catch it by drinking directly from ponds, lakes and streams, from freshly spawned bottles and canteens (which have a chance of being contaminated), or by drinking from a water pump with bloody hands. A blood transfusion from an infected survivor can also pass it on.
Symptoms appear several minutes after infection and are brutal: violent vomiting, blurry vision, the occasional forehead-wipe of a fever, and a stomach that can no longer hold much liquid. Hydration drains faster and faster as it progresses, so cholera and dehydration form a vicious cycle. Cure it with Tetracycline Pills and/or Multivitamin Pills — taking both together recovers you fastest. Note the sickness icon on your HUD can vanish before the disease is truly gone, so take one extra pill after it disappears.
Prevention is simple: only drink water you have boiled, treated with chlorine/water-purification tablets, or sourced from a well or wash basin.
Wound infection: the cost of a dirty bandage
Wound infection occurs when you let a wound self-heal, or treat it with rags, bandages, bandanas or a sewing kit that were not disinfected first. It runs in two stages. In stage one your character makes pain sounds, vision blurs, and stamina regenerates slower. In stage two the pain sounds grow louder, you develop a fever, your hands shake, and your water drains noticeably faster.
The cure depends on the stage, and this catches a lot of players out. In stage one, antibiotics do nothing — you must disinfect the wound with Disinfectant Spray, iodine, or alcoholic tincture. In stage two, disinfecting is no longer enough and you need Tetracycline Pills. The fix is to never reach this point: always disinfect your rags and bandages before you bandage up.
Cold, flu and pneumonia: the cold-weather chain
These three are stages of one escalating illness driven by being cold and wet. It starts when your heat comfort stays low (the blue temperature icon) for too long while your immune system is weak.
- Common Cold — only symptom is sneezing. Warm up (get your temperature back to white or higher) and a weak cold will fade on its own within about half an hour. Tetracycline and Multivitamin Pills also clear it.
- Influenza — an untreated cold advances here. Adds coughing and fever (blurry vision, faster water drain, raised body temperature you can read with a Medical Thermometer). Warming up regresses it back toward a cold; pills speed recovery.
- Pneumonia — the most severe stage. Critically, warmth and vitamins alone are not enough here. You must take Tetracycline Pills to push it back down to influenza, then continue treatment from there.
The takeaway: stay dry, build fires, and treat a cold early. Letting the sniffles slide for an hour can land you in pneumonia, which only antibiotics will fix.
Salmonella and poisoning: the food dangers
Salmonellosis (“food poisoning”) comes from eating raw, rotten or tainted animal products, or from eating with bloody hands. It can also strike when you eat with a weak immune system. Wolf and bear steaks are notorious — they can stay contaminated even after cooking. Symptoms centre on heavy vomiting that rapidly drains both energy and hydration. Cure it with Charcoal Tablets or a Multivitamin Pill.
General Poisoning comes from eating burned or rotten food, gasoline, raw fish, certain berries, or mystery cans. Once it progresses you vomit intermittently, become exhausted and lose stamina regeneration. Charcoal Tablets cure it (or you can wait it out). A related Chemical Poisoning can develop from drinking things you should never drink — alcoholic tincture, disinfectant or gasoline — and is also treated with charcoal.
Separately, Gas Poisoning occurs in contaminated/toxic zones if you enter without a working gas mask filter, or bleed inside one. This is not cured with the usual pills — you need the PO-X Antidote, which instantly clears the earlier stages.
DayZ disease quick-reference table
| Disease | Main cause | Key symptoms | Cure |
|---|---|---|---|
| Cholera | Dirty/unclean water, bloody-hand pumping | Vomiting, blurry vision, fever, fast hydration loss | Tetracycline + Multivitamin Pills |
| Wound Infection (Stage 1) | Self-healing wound or dirty bandages/rags | Pain sounds, blurry vision, slow stamina | Disinfectant Spray, iodine or alcoholic tincture |
| Wound Infection (Stage 2) | Untreated stage-one infection | Fever, shaking hands, loud pain, fast water loss | Tetracycline Pills |
| Common Cold | Low heat comfort / being cold and wet | Sneezing | Warm up; Tetracycline / Multivitamin Pills |
| Influenza | Untreated cold while cold | Sneezing, coughing, fever | Warm up + pills |
| Pneumonia | Untreated influenza | Severe cough and fever | Tetracycline Pills (warmth alone won’t cure) |
| Salmonellosis | Raw/rotten meat, bloody hands | Heavy vomiting, energy & water drain | Charcoal Tablets or Multivitamin Pill |
| Poisoning | Burned/rotten food, gasoline, bad berries, raw fish | Vomiting, exhaustion, slow stamina | Charcoal Tablets (or wait it out) |
| Gas Poisoning | Toxic zone with no/empty filter, or bleeding in zone | Contamination damage, unconsciousness at high stage | PO-X Antidote |
Building a survival medkit
Most of these supplies spawn in medical loot: hospitals, clinics, ambulances and medical tents. A solid loadout covers Tetracycline Pills, Multivitamin Pills, Charcoal Tablets and at least one disinfectant (spray, iodine or alcoholic tincture). For more on where to find this gear, see our DayZ best loot locations guide. If your routine involves a lot of hunting and cooking, our fishing guide and farming guide show how to produce safe, disease-free food.
Frequently asked questions
What is the most common disease in DayZ?
Cholera, because new survivors almost always drink from ponds, streams or freshly spawned bottles before they can boil water. It is also one of the most punishing early on, since the constant vomiting drains hydration faster than you can refill it. Only drink boiled, treated or well water to avoid it entirely.
Can you cure a disease in DayZ without medicine?
Sometimes. Keeping Energy, Water, Blood and Health high raises your immune system, which can clear milder infections like cholera or a common cold on its own. Warming up by the fire reverses the cold and flu stages. However, stage-two wound infection and pneumonia generally require Tetracycline Pills regardless of how healthy you are.
Why do I still get sick after cooking my meat?
Some meats, notably wolf and bear steak, can remain contaminated even after cooking, so they can still give you salmonella. The reliable workaround is to take a Multivitamin Pill before eating to boost your immunity to maximum for the duration of digestion, then eat the steak.
Stay healthy, and bring friends
Disease management is far easier with a squad — one player can hold the medkit, boil water and cook safe meals while others scavenge. If you want a persistent world where you and your friends can stockpile medicine and survive the long game together, spinning up a dedicated DayZ server for your group gives you full control over loot, health settings and your own private Chernarus. For step-by-step setup help, our DayZ server documentation walks you through configuration. Heading somewhere colder? The frozen island in our DayZ Sakhal map guide makes cold-weather illness a constant threat, and the brutal Namalsk survival mod adds its own afflictions on top of everything above.
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